/Engine/Plugins/Online/OnlineServices/Source/OnlineServicesInterface/Public/Online/Schema.h
Two phase commit from the service. Prepare data to be written to the client from a service snapshot of attributes.
[TOnlineResult](API\Plugins\OnlineServicesInterface\Online\TOnlineResult)< [FSchemaCategoryInstancePrepareServiceSnapshot](API\Plugins\OnlineServicesInterface\Online\FSchemaCategoryI-_4) > PrepareServiceSnapshot ( [FSchemaCategoryInstancePrepareServiceSnapshot::Params](API\Plugins\OnlineServicesInterface\Online\FSchemaCategoryI-_4\Params) && Params ) const